It is 21 because 21/21 = 1 and 21/7 = 3
7
3 can go into both these numbers 72/3= 24 21/3= 7
First you have to make the same denominators: Find the lowest number that 7 and 3 both go into which is 21. So multiply the denominator by the number that makes 21 on both 2/7 and 1/3. Make sure to multiply the number you used on den. on the numerator to. Here are the new fractions: 6/21 and 7/21 Then subtract as normal. Answer would be negative 1/21 or -1/21
The numbers 7 and 3 can both divide into any multiple of their least common multiple (LCM). The LCM of 7 and 3 is 21, so they can go into any multiple of 21, such as 21, 42, 63, and so on. Additionally, they can also go into any number that is a multiple of either 7 or 3 individually.
1, 3, 7, 21.
7
1 and 7 both can.
21
3 can go into both these numbers 72/3= 24 21/3= 7
The (LCM) Least Common Multiple of 7 and 3 is 21 because that is the LEAST number that both 3 and 7 go into.
The (LCM) Least Common Multiple of 7 and 3 is 21 because that is the LEAST number that both 3 and 7 go into.
21 = 3 x 7 both 3 and 7 are prime numbers
Both 14 and 21 can be divided by their greatest common divisor, which is 7. Thus, they both go into any multiple of 7, such as 7, 14, 21, 28, and so on. Additionally, they both go into 42, which is the least common multiple of the two numbers.
7
First you have to make the same denominators: Find the lowest number that 7 and 3 both go into which is 21. So multiply the denominator by the number that makes 21 on both 2/7 and 1/3. Make sure to multiply the number you used on den. on the numerator to. Here are the new fractions: 6/21 and 7/21 Then subtract as normal. Answer would be negative 1/21 or -1/21
The numbers 7 and 3 can both divide into any multiple of their least common multiple (LCM). The LCM of 7 and 3 is 21, so they can go into any multiple of 21, such as 21, 42, 63, and so on. Additionally, they can also go into any number that is a multiple of either 7 or 3 individually.
1, 3, 7, 21.